public void Test_FileExists()
{
var storage = new DiskIsolateStorage("Test", baseDirectory);
storage.InitStore();
string storePath = Path.Combine(baseDirectory, "Test");
//创建文件
string testString = "This is teststring";
MemoryStream stream = new MemoryStream();
byte[] buffer = Encoding.Default.GetBytes(testString);
stream.Write(buffer, 0, 18);
var filePath = Guid.NewGuid().ToString() + ".txt";
storage.CreateFile(filePath, stream);
bool result = storage.FileExists(filePath);
//删除文件
storage.DeleteFile(filePath);
bool result1 = storage.FileExists(filePath);
Assert.IsTrue(result);
Assert.IsFalse(result1);
}